Rock-drill.



T. E. STURTEVANT.

v ROCK DRILL. APPLICATION FILED APR-l7. l9l5- Patented Apr. 16, 1918.

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T. E. STURTEVANT.

' ROCK DRILL. APPLICATION F ILED APR-17,1915.

1,263,143. PateutcdApr. 16, 1918.

2 SHEETS-SHEET 2.

THOMAS E. STURTEVANT, OF DOVER, NEW JERSEY, ASSIGNOR T0 MoKIERNAN-TERRY DRILL COMPANY, 0]? DOVER, NEW JERSEY, A CORPORATION OF NEW JERSEY.

ROCK-DRILL.

Specification of Letters Patent.

Patented Apr. 1e, 121a.

Application in... April 17, 1915. Serial at. 22,124.

known as hammer drills and are adapted to utilize hollow drill steels.

One object of my invention is to provide a simple and direct-acting nozzle forlintroducing cleanin fluid into the drill steel of an engine of t e character above'indicated.

Another object is to provide a relatively simple and rugged anvil block, adapted to be interposed between the hammer and the drill steel and having a cleaning fluid nozzle extending into the drill steel.

Other object and advantagesof my invention will be set forth hereinafter,'and in order that m invention may be thoroughly understood, the same in the following specification and then point out the novel features thereof in ap ended claims.

eferring to the drawings Figure 1 is an elevation of the lower portion of a drilling engine embodying my invention.

Fig. 2 is a sectional elevation taken on the line 2-2 of Fig. 1 and drawn to a larger scale, in order to set forth the interior mechanism in detail.

Fi 3 is asectional plan view taken on i the hue 3-3 of an .2.

Fig. 4 is a detai view of the anvil block of'Figs. 2 and 3 with its various parts separated to show the form of each.

A modified structure, which also embodies my invention, is shown in 5 which cor-.

responds to Fig. 2. 0

Fig. 6 is a view corresponding to Fig. 4, of the anvil block of Fig. 5.

Reference may first be had to Fri 41 inclusive in which 10 represents t e (glinder of a drilling engine, 11 the cylin er will now proceed to descr1be .lto

extension, 12 a rotatable sleeve mounted in the extension and having a socket 13 adapted to receive the shank of a hollow drill steel 14.; 15 is the piston of the engine, and 16 a hammer extension thereof.

' The socket 13 has a flange or cap 17 which engages the end of the sleeve 12, the socket being screw-threaded at 18 to permit it to be screwed into an internally threaded section 19 near the outer end of the sleeve.

The sleeve 12 has a flange 20 which is interposed between the end of the cylinder 10 and a shoulder 21 on the cylinder extension 7 11, and hence revents longitudinal displacement of the s eeve. Within the sleeve is an inwardly extending annular projection 22 formin a restricted opening which is cylindrica at its outer end and tapers inwardly toward its inner end. The inner end of the socket 13 is counterbored at 23 to constitute a continuation of the cylindrical opening in the rotary sleeve.

The anvil block which forms a part of my invention is disposed in the restricted opening formed by the annula projection 22 and extends into the counterbored opening 23 in the socket. The anvil comprises a cylindrieal block. 24 having a tapered opening 25. a nozzle 26, a plug 28 and a frusto-conical block 27.

The block 27 is adapted to fit into the tapered portion of the opening constituted by the annular projection 22 and the plug 28 fits closelv into the larger end of the tapered hole 25 into whi h it is driven.-

The body of the nozzle 26 is tapered to fit into the lower middle of the tapered hole 25 and in assembling the anvil block the nozzle is first fixed in position and afterward the plug 27 is driven into the opening of the hole 25. The nozzle has a relatively long projection 29 which is adapted to extend outwardl beyond the end of the anvil block into tlie opening such as 31 when the steel tion in the socket 13.

The hammer 1 6 is formed to coiiperate with the opening in the sleeve so that-the sleeve is forced to rotate with the piston in a Well known manner; for example, the

30 of a hollow drill steel hammer may be provided with feathers to coiiperate with spllIles in the sleeve, as shown in Fig. 2.

The cylindrical member 24 0f the anvil block has a plurality of passages 32 preferably extending in radia planes from its outer surface to the tapered hole 25, where there is a chamber 33 between the plug 28 and the inner end of the nozzle. In the sleeve 12, opposite the outer ends of the holes 32, is an annular passage 34 contalning spaced rings 35, which are held apart by springs 36, and suitable packing rings 37 against which the rings 35 press.

The sleex e 12 is provided with a plurality of openings 38 which communicate with the annular passage 34 at their inner ends and with another annular. passage 39 at their outer ends. This passage is provided with spacing and packing rings and with a spring corresponding to the .rings and springs in the passage 34 and is formed by a flanged ring 40 which is mounted on the lower end of the cylinder extension 11. The flanged ring has an inlet port 41 which is adapted to be connected to an inlet pipe 42 from which cleaning fluid, either water, air, or both water and air, is supplied to the drill.

The fluid enters through the port 41 into the annular passage 39 and flows inwardly from this passage through the openings 38 in the rotary sleeve 12, into the annular passage 34. From this passage it flows through the holes 32 into the chamber 33 and from the chamber 33 in the anvil block outwardly through the opening in the nozzle 26 into the hole 30 of the hollow drill. steel 31.

The drill steel is polygonal in shape and is fitted into the socket 13 so that it is rotated when the socket and sleeve are rotated, these parts being turned by a turning movement which is imparted to the piston 15 in a well known manner.

The nozzle has a relatively small hole and consequently discharges the cleaning fiuidat a relatively high velocity and since the nozzle extends directly into the end of the steel tllti velocity is very effective in cleaning the ho e.

The anvil block may be utilized in a nonrota'ting drill such as that shown in Fig.

' 5, and the anvil block itself may be made up in any suitable manner as shown in Figs. 5 and 6. Referring to these figures, the engine here shown comprises a cylinder in which a piston 51 reciprocates, a'cylinder extensi0n52, a socket 53, and an anvil block 54.

The end of the cylinder 50 is provided with a tapered opening 55 which is adapted to receive the frusto-conical end of the anvil block as clearly shown in the drawing.

. of my invention,

memes The cylinder extension 52 is internallythreaded at 56 near its outer end to receive the socket 53 which has a flange 57 at its outer end and is screwed into the cylinder extension. The socket is counterbored at 58 to receive the outer end of the anvil block, and an annular passage 59, which corresponds to the passage 34 of Fig.2, is provided between the outer end of the cylinder 50 and the inner end of the socket 53. This passage is provided with spacing and packing'rings and a sprin to correspond to the rings and spring of t e passage 34.

The cylinder extension 52 is provided with an inlet port 60 which corresponds to the port 41 and is adapted to receive an inlet pipe 61. lit communicates with the annular passage 59.

The anvil block has a plurality of passages opening at their outer ends into the annular passage 59 and opening at their inner ends into a tapered hole 62 in the outer end of the, anvil block. A nozzle 63 which corresponds to the nozzle 26 is set into this tapered hole 62, being preferably wedged in place by a taper sleeve 64. The nozzle extends outwardly from the anvil block into the opening 65 of a drill steel 66.

The operation of the nozzle is the same in this structure as in the revious figures. The anvil is clearly shown in detail in Fig. 6.

The packing which is intended to prevent leaka e of the cleaning fluid may be formed and arranged in any suitable manner and the details of the anvil structure may be modified within the spirit and scope and consequently I intend that only such limitations be imposed as are indicated in the appended claims.

What I claim is:

1. An anvil block for drilling engines comprising a body having a tapered opening, a nozzle fastened in the opening and extending beyond the end of the anvil block at its outer end and passages extending from the surface of the block inwardly to the tapered opening.

2. An anvil block for drilling engines drilling engines 7 extending beyond the end of the anvil block at its outer end and passages extending from the surface of the block inwardly to the tapered opening and means for closing the inner end of the tapered opening.

memes t g 4. An anvil block for drilling engines tapered 0 ening, a frusto-conicel head and comprising a body having a tapered enena wedge tted closely into the inner end of? ing, a nozzle fastened in the opening and the tapered opening in the cylindrical body. extending beyond the end of the anvil block In witness whereof I have hereunto set my 1e 5 at its outer end and passages extending from I hand this 16 day of April, 1915.

the surface of the block inwardly to the THOMAS E STURTEVANT. 

